I need 2,3, and 4. Same problem just parts. 002 (part 1 of 3) 10.0 points The tu

Question

I need 2,3, and 4. Same problem just parts.

002 (part 1 of 3) 10.0 points The turntable of a record player rotates initially at the rate 33 rev/min and takes 27.23 s to come to rest. What is the angular acceleration of the turntable, assuming the acceleration is uniform? Answer in units of rad/s2 003 (part 2 of 3) 10.0 points How many rotations does the turntable make before coming to rest? Answer in units of rev 004 (part 3 of 3) 10.0 points If the radius of the turntable is 22 cm, what is the tangential acceleration of a point on the rim at t = 0? Answer in units of cm/s2 005 10.0 points 007 10.0 points Consider three objects of different shapes: a solid a thin hollow square. The are hollow and their mass, but the disk is solid mass density over its Compare the three object ertia when rotated around centers of mass.

Explanation / Answer

002)

33 rev/min converts to 3.46 rad/s

Now apply wf = wo + alpha(t)

0 = 3.46 + alpha(27.23)

alpha = -.127 rad/s^2 (Negative means slowing down. Ignore the negative if needed for you answer key)

003)

Apply Theta = wot + .5(alpha)t^2

Theta = (3.46)(27.23) + (.5)(-.127)(27.23)^2

Theta = 47.1 rad

Convert to revs - 47.1/2pi = 7.5 revs

004)

a = (alpha)r

a = (-.127)(22)

a = -2.794 m/s^2 (Same idea with negative as in first answer)

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